Concrete-mold or the like.



S. RANDOLPH.

CONCRETE MOLD OR THE LrKE.

APPLICATION FILED JAN 2?. 1912.

1 153 25, v PatentedSeptfH, 1915.

2 SHEETS-SHEET l.

s. M. RANDOLPH,

CONCRETE MOLD OR THE LIKE.

APPUCATION mat: JAN- 21. 1912.

L1$$fi5% 1 Patente dfiept. fit, 1%15 Z SHEETSSHEET 21' .s ra rnnr orisrcia SMITH Kill. RANDQLPH, OF CHICAGO, ILLINQIS.

insects.

CQNCRETE-MU'LD 0H, THE LIKE.

Specification o1 Letters'Patent. Patgntmdl fitgpt, 1141 191M53 I Application filed January 27, 1912. Serial No. 673,915.

ful Improvements'in Concrete-Molds or the like, of which the following is a description.

My invention belongs to that general class of devices known as molds, and relates particularly to a mold for casting reinforced concrete beams, floor slabs, or the like, preferably hollow reinforced beams for building constructions.

With the preferred construction a minimum of parts are required for casting a plurality of beams, which, it may be mentioned,

are preferably cast with the underside of the beam at the top of the mold, that is, the beams are cast bottom side up.

The invention hasamong its objects the production of a device of the kind described that is simple, convenient, durable, efficient and satisfactory, which comprises a minimum of parts, requires a minimum of space, and may be used wherever found applicable.

- To this end my invention consists in the novel construction, arrangement and combination of parts herein showp and departicularly pointed outscribed, and more in the claims.

In the drawings, wherein like reference chardcters indicate like or corresponding parts, Figure 1 is. an end elevation and partial sectional view of several molds arranged on a suitable foundation. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged sectional view similar to the upper left hand mold shown in Fig. 1. Fig. 4: is'a top plan view of a portion of Fig. '1, the top plates removed,and Fig. 5 is a perspective view of one of the core supports or chairs.

Referring to the drawings, in which my preferred form of mold is shown, 1 represents a suitable base or foundation of concrete, wood, or an equivalent, the size of the same depending upon the size of the molds and the number of molds to be set up at one time. The foundation is preferably formed with a slight depression or concavity sub stantially as illustrated in Fig. 2, so that the beams 3, which, as before mentioned, are

' preferably cast with the top down, are

slightly convex on their top side. it is, of course, understood that when the be ms are in position, the weight of the beam draws any slight sagging of the beam vmolds are set up,

.tion than making them the center down so that the top face is practically straight or level This prevents at the center below the ends after the beam has been positioned.

The construction of the mold may be best understood by referring to Fig. 3, which is an enlarged sectional view of one of the molds. Referring to this figure, 2 and. 2 are plates, preferably of sheet metaharranged to form the bottom and top surface of the beams, it being understood that when the for example as shown in Fig. 1, that the top plate of one mold may be the bottom plate of the mold above. The mold comprises side pieces 4, which are preferably offset between the edges, or what is the same thing, ofl'set one edge 5 the desired distance on one edge, and thence extended as at 6 parallel with the main portion of the side piece. The other portion or edge is preferably offset as at 7, and extended as at 8. In constructing the side pieces, I preferably secure two similar pieces to gether with the edges 8 and 6 of each in contact, and secure the same by rivets or bolts 9, or their equivalents. Forming the sides of sheet metal gives a much lighter construcof solid material, as for example, casting them, but the results, as far as molding is concerned, are, of course, substantially the same. It will be noted by referring to Fig. 3, that the offsets 5 are c0n siderably less than the offsets 7. I preferably insert spacing members 10 to keep the edges 6 separated. By so constructing the sides it is obvious" that the bottom of the beam is greater in width than the top side, and the central portion of less width than at either edge, so that when the beams are positioned there is a space at the top of the beam which may be filled with suitable material, as for. example, concrete filling the spaces to the top of the two adjacent top edges and locking the beams together.

The core, the boards or slabs being prefer.-

ably cast hollow, is removable andprefen ably constructed of shown comprises. a sheet 15 bent or formed as at 16, 16, and then bent so that the ends or While the core is tangular, it is, of course, understood. that it may be formed so as to giveany other form of cross section. The

edges 18, 18- overlap.

sheet metal. The core again as at 17,17,

edges of the core are shown substantially rec- Iran) preferably oilset as at 19, 19, and the core also ofiset as at 2.0, 20 to correspond, so that when the core is set up, the edges at 19 will engage with the outer edges of the notches 20, substantially locking the same and pre venting them from drawing apart, or being forced together. The edges are preferably supported and locked in engagement by the desired number of cup-shaped members, comprising the two sides 21, 21, connected as at 22, and preferably having their ends 23 turned back so as to engage in the notches 20, 20 of the ends of the core member. To support the core in the mold, I provide a number of chairs, the same being most clearly shown in Fig. 5, each chair consisting of a rod 25 having its ends bent as at 26, thence as at 27, thence back as at 28, and out as at 29. T he desired number of these chairs or supports are arranged at intervals along the core, and support the same when in position. The concrete-is poured and cast around. them, and when the mold and core are removed, they are left in the beam and serve to reinforce the same rather than weaken it. Any equivalents for the supports 21 and chairs may be employed for the purpose. By extending the ends 29, the bars or supports are convenient for supporting the tie or reinforcing rods 30, extending through the beam. I have shown a suitable reinforcement, it being understood, however, that I 'do not Wish to limit myself to the particular reinforce m it shown. The reinforcement illustrated in the drawings comprises the rods 31 and the wire 32, together with the rods 33 and Wire 32, and I also show the rods 34 and 35 extending throughout the length of the beam. In Fig. l, I show aplurality of molds, it being understood that any number may be assembled in substantially a similar manner, so that a plurality of beams or slabs may be cast, but little floor space being required for the purpose. As shown, the side pieces are set up, the number depending upon the number of beams to be cast inthe first tier. Between each pair of side pieces I arrange an end plate 37, 38, the same being made in two parts for convenience in handling. The two parts, however, may be looked together by a locking member 89 arranged at each end and pivotally secured at to one part, and arranged to engage a lug 41 on the opposite part. The end pieces are each provided with a output corresponding to the core. The end pieces maintain the side pieces in their spaced positions, the length of the same determining the width of the beam, and their distance apart the length of the beam. They are cut out at the ends to correspond with the offset side pieces, and may be positioned, not only at the ends of the mold, but it short length beams are desired, they may be placed intermediate the ends, and one,

two or more short beams or floor slabs cast at the same time that along or short beam or slab is cast in an adjacent mold. The side pieces may be held together in any suitable manner, clamping l'llClllbGlS 43 being shown for the purpose, which are provided with ends 44: and 45 and a screw d6 for the purpose' of adjustment.

In using the mold, the desired number of bottom plates are placed upon the foundation 1, and then the side pieces positioned, the number depending upon the number of beams desired to be cast side by side on the foundation. The end pieces are arranged between the sides and the parts nmintained in position by thaclamping or looking members 43. The bars 95 are then inserted and the core positionedgit being understood that the reinforcement 22 has been already positioned. The core is arranged with the free ends, or that is, the overlapping engaging ends, supported and locked in position by the supporting members 21. The mold may then be filled with concrete to the top of the side pieces, it being understood that the reinforcement is in position, as mentioned. When one tier is completed more plates 2 are positioned on top of the same, andanother tier of side pieces and end plates set up inposition, and the concrete poured. This may be continued, as previously described, until the desired height or number of tiers is reached. After the concrete has set sufiiciently, the cores may be removed, by first withdrawing the supporting members 21, so that the cores will spring, owing to its weight and resiliency, substantially as indicated by the dotted lines in the upper right hand mold, shown in Fig. 1. The side pieces may also be drawn and set up in another p ice, and the molding of beams or slabs continued without disturbing the several tiers of cast beams until it is desired to remove the same for use, or for storage.

It will be seen that each mold and core comprises a minimum of parts, and that it is simple and convenient for use, and that a number of molds may be set up and more than one beam or slab may be cast at one time without requiring a great floor space. By casting the beams reversed and in the shape or form shown, when they are reversed and put into position with the upper edges in contact, there is a space, as before mentioned, at the top and a wider space between the beams. Into this space tie rods from one side of the building to the other, or the equivalent, may be inserted, if desired, and the beams locked by pouring concrete into the space at the top between the beams.

plicable.

obvious araaaaa Having thus described my invention, it is that various immaterial modifications may be made in the same without departing from the spirit or my invention, ience I do not wish to be understood as limiting myself to the exact form, construe Y tron, arrangement, or combination ofparts ranged. to overlap and inter engage,

herein shown and described, or uses mentioned.

W hat l claim as new and. desire to secure by Letters Patent is 1. in a device of the kind described and in combination, side and end pieces, each side piece comprising a pair .of members spaced from each other with their edges inwardly oiiset, the edges of each on one side offset to contact with the edge of the other with the opposite edges spaced from each other, andmeans for securing said pieces together I 2. The combination in a mold of a re-' movable core therefor, comprising a sheet of resilient material formed with its edges overlapping and inter-engaging, and means for locking said engaging edges in engagement with each other.

3. The combination in a mold of the kind described of a removable core, comprising a resilient plate of metal having its edges armeans for spacing the core and maintaining said overlapping edges in engagement, comprising a ll-shaped member arranged to contact with one side of the mold and engage the same at the opposite side, and means for supporting said core within the mold.

i. In a device of the kind described and in combination, a plurality of side pieces, each side piece comprising two pieces secured together with a space therebe'tween intermediate the edges, end pieces arranged between said side pieces, means for securing the side and end pieces together, a removable core and means for supporting the same within the mold, said core comprising a flexible resilient plate bent with its edges overlapping, and provided at said overlapping part with inter-engaging grooves, and

means for maintaining said edges in engagement with each other.

5. In a device of the kind described, and in combination, a plurality of side and end pieces, each side piece comprising a pair oi members spaced from each other with their edges inwardly offset, the like edges forming one edge of a side piece being in contact and the edges forming the other edge of the side piece being secured apart in spaced relation by inserts, and means for securing said pieces together.

6. The combination in a mold, of a removable core therefor, comprising a sheet of resilient material formed with its edges overlapping and interengaging, and means arranged between said overlapping edges and the opposite sides of the core for spacing the same and locking said engaging edges in engagement with each other.

7. The combination of a mold, of a removable core therefor comprising a sheet of resilient material, formed with edges overlapping and having a series of interengaging grooves, and means comprising a V-shaped member arranged between the said overlapping edges and the opposite side of the core for spacing the same and, locking said engaging edges in engagement with each other.

8. In a device of the kind described, and in combination, a plurality of adjacent side pieces having their upper and lower edges outwardly oflset, one of the edges being offset to a greater extent than the other, a pair of end pieces between each two adjacent side pieces, arranged with one side piece in common, a core for each mold, said core comprising a. sheet formed with its edges interengaging and means for securing the said edges together.

lln testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses. Y

SMITH M. RANDOLPH.

Witnesses:

ROY W. HILL, CHARLss-ll. Goes. 

